In the field of electrical control, AC Contactor is a key component that undertakes the tasks of circuit switching and motor control. It is widely used in various electrical systems and plays an irreplaceable role in ensuring the safe, stable and efficient operation of electrical equipment. Zhejiang C&J Electrical co., ltd. (referred to as C&J Electrical) has rich experience in the research and production of AC Contactor. Its launched CJX2 III (NEW) series AC contactor has excellent performance and wide adaptability, providing reliable support for industrial and commercial electrical control systems.
Core Role of AC Contactor in Air Conditioning Systems & Basic Definition
The AC contactor is a vital electrical component in your air conditioning system, acting as a switch to regulate the flow of electricity. It automatically engages or disengages the connection based on thermostat signals, ensuring your AC runs smoothly and efficiently. Beyond air conditioning systems, AC Contactor is essentially an electromagnetic switch that uses the electromagnetic force generated by the AC coil to drive the contact action, thereby realizing the connection or disconnection of the main circuit and control circuit.
Different from ordinary mechanical switches, AC Contactor has the characteristics of large current-carrying capacity, remote control, and frequent operation. It can quickly switch on and off high-power circuits under the control of small current signals, avoiding the danger of manual operation of high-voltage and high-current circuits, and improving the automation level of the electrical system.
Overview of AC Contactor
AC Contactor is a commonly used electrical control component in low-voltage electrical systems, which is mainly composed of electromagnetic system, contact system, arc-extinguishing system and auxiliary components. The electromagnetic system includes an AC coil and an iron core. When the coil is energized, it generates electromagnetic force to attract the iron core, driving the contact to close; when the coil is de-energized, the electromagnetic force disappears, and the contact is reset and disconnected under the action of the spring.
The contact system of AC Contactor is divided into main contacts and auxiliary contacts. The main contacts are used to connect and disconnect the main circuit with large current, and are usually made of materials with high conductivity and wear resistance; the auxiliary contacts are used in the control circuit to realize functions such as interlocking, self-locking and signal transmission. The arc-extinguishing system is used to extinguish the electric arc generated when the contacts are disconnected, preventing the arc from burning the contacts and ensuring the reliable operation of the contactor.
According to the rated current, voltage level and application scenario, AC Contactor can be divided into various models and specifications. High-quality AC contactors usually comply with international standards such as IEC60947-4 and national standards such as GB/T14048.4, ensuring stable performance and safe use.
Core Functions of AC Contactor
As a core component of electrical control systems, AC Contactor integrates multiple key functions, providing important guarantees for the safe and efficient operation of electrical equipment:
- Circuit switching control: Realize the remote connection and disconnection of the main circuit, which is suitable for high-power circuits that are not convenient for manual operation, improving the convenience and safety of operation.
- Frequent motor starting & control: It is specially designed for the frequent starting and stopping of AC motors. It can bear the impact current when the motor starts, protect the motor and the circuit, and extend the service life of the motor.
- Overload protection matching: It can be combined with thermal relays to form an electromagnetic starter. When the motor or circuit is overloaded, the thermal relay acts to cut off the control circuit, and the AC contactor is disconnected, thereby protecting the circuit and equipment from overload damage.
- Electrical interlocking protection: Through the auxiliary contacts, interlocking control between multiple electrical equipment can be realized, preventing misoperation and ensuring the safe and coordinated operation of the system. For example, in the forward and reverse control of the motor, the AC contactor’s interlocking function can avoid short circuits caused by simultaneous energization of forward and reverse coils.
- Signal transmission & system automation: Cooperate with sensors, thermostats, controllers and other components to realize automatic control of the system. For example, in the air conditioning system, it responds to the thermostat signal to automatically start and stop the compressor, realizing intelligent temperature control.
C&J Electrical’s CJX2 III (NEW) Series AC Contactor: Core Advantages & Product Overview
C&J Electrical’s CJX2 III (NEW) series AC Contactor is a high-performance product designed for industrial and commercial electrical control scenarios. It is mainly used in circuits with AC 50Hz (or 60Hz), voltage up to 690V, and current up to 95A. It is suitable for remote connection and disconnection of circuits, frequent starting and control of AC motors, and can be combined with appropriate thermal relays to form an electromagnetic starter to protect circuits that may experience operational overload. The product complies with GB/T14048.4 and IEC60947-4 standards, with reliable quality and stable performance. Its core advantages and technical parameters are as follows:
Core Advantages
- Wide application range: Suitable for AC 50/60Hz circuits, with voltage up to 690V and current up to 95A, covering the needs of most medium and small power electrical control scenarios.
- Stable and reliable performance: Complies with international and national authoritative standards, with strict quality control, ensuring stable operation in harsh working environments.
- Flexible auxiliary contact configuration: Multiple auxiliary contact combinations (4NO+0NC, 2NO+2NC) are available, which can meet different control circuit requirements and improve the flexibility of system design.
- Strong overload and impact resistance: It can bear the impact current when the motor starts, and can be matched with thermal relays for overload protection, ensuring the safety of the motor and circuit.
- Customizable services: Supports OEM/ODM brand customization services, which can be tailored according to customer needs to meet the personalized requirements of different market segments.
- High safety performance: Equipped with a complete arc-extinguishing system and reliable contact structure, which effectively prevents arc damage and ensures safe operation.
Key Technical Parameters
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Parameter
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Details
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|---|---|
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Current
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9A – 95A
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Rated Power
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4kW – 45kW
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Control Circuit Voltage
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24V – 440V, 50/60Hz
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Auxiliary Contacts
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4NO+0NC, 2NO+2NC
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Standard
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IEC/EN 60947-4-1
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Wide Application Scenarios of CJX2 III (NEW) Series AC Contactor
With excellent performance and strong adaptability, the CJX2 III (NEW) series AC Contactor is widely used in various industrial and commercial electrical control scenarios, including:
- Air conditioning systems: As a key component of central air conditioners, household central air conditioners and industrial air conditioners, it controls the start and stop of compressors and fans according to thermostat signals, ensuring the stable operation of air conditioning systems.
- Motor control systems: Frequent starting and control of AC motors in industrial workshops, such as water pumps, fans, conveyors, compressors and other motor equipment.
- Electrical control cabinets: Used in various electrical control cabinets and distribution boxes in factories, shopping malls, office buildings and other places to realize circuit switching and system control.
- Industrial production lines: Used in the control system of automated production lines to control the start and stop of various production equipment and ensure the coordinated operation of the production line.
- Refrigeration systems: Control the operation of compressors and condensing fans in refrigeration equipment such as cold storage, refrigerators and freezers.
- Other electrical equipment: Various electrical equipment that requires frequent circuit switching and motor control, such as generators, pumps and fans in water supply and drainage systems.
Why Choose C&J Electrical’s CJX2 III (NEW) Series AC Contactor?
In the field of AC Contactor, the CJX2 III (NEW) series product from C&J Electrical has obvious competitive advantages:
- Reliable quality assurance: Complies with international and national authoritative standards, with strict production process control and quality inspection, ensuring long-term stable operation of the product.
- Strong adaptability: Wide range of rated current, voltage and power, suitable for various medium and small power electrical control scenarios, meeting diverse customer needs.
- Flexible and convenient configuration: Multiple auxiliary contact combinations are available, which is convenient for system design and installation, and improves the efficiency of project implementation.
- Safe and durable: Advanced arc-extinguishing technology and high-quality contact materials are adopted, which have strong overload and impact resistance and long service life.
- Customizable services and professional support: Provides OEM/ODM brand customization services; C&J Electrical has a professional technical team that can provide customers with tailored electrical control solutions and comprehensive after-sales services.
Get in Touch
If you have any questions about the CJX2 III (NEW) series AC Contactor, such as product specifications, technical details, customization needs, or bulk orders, please feel free to contact C&J Electrical. Our professional team will provide you with high-quality services and reliable electrical control solutions to ensure the safe and stable operation of your electrical system.
Post time: Jan-12-2026